Clay and sand screen.



Patented Nov. 29, 1910.

2 SHBBTS-8HEET 1.

TOR. yW j ATTORNEY.

A. W. HOLL. CLAY AND SAND SCREEN.

APPLICATION I-ILBD AUGLYZ, 1909.

Patented Nov. 29, 1910.

2 SHEETS-SHEET 2.

WITNESSES.-

A TTOR/VE i nn: NORRIS PETERS 00., wasumonm, n c

ADOLPH W. HOLL, OF CLEVELAND, OHIO.

CLAY AND SAND SCREEN.

ovaooe.

Specification of Letters Patent.

Application filed August 2, 1909.

Patented Nov. 29, 1916.

Serial No. 510,928.

My improvement relates to improvements in the form of the screen bars with means for their support and the means for keepingclear, the openings between said screen bars.

I attain these objects by the mechanism illustrated in the accompanying drawing, in which- Figure 1 is a top view showing part of the screen bars and clearing blades in position. Fig. 2 is an elevation of the right side. Fig. 3 is a longitudinal sectional view. Fig. 4 is a cross section of a side frame showing connecting bars and guides. Fig. 5 is a cross section of screen bar clamp. Fig. 6 is section of center support for screen bars. Fig. 7 is an enlarged section of screen bars, supporting and spacing comb and clearing blades.

Similar figures refer to similar parts throughout the several views.

The frame of the screen consists of spaced parallel channel-bars 30 and 31 between which are secured end-bars 12 and which serve as supports for the ends of the screenbars 10. Eye-bolts 32 are provided for the usual suspension of the screen. Said side or channel-bars 30 and 31 are mounted to have the channels turned outwardly or in opposite relation, and carry therein the guides 34, whose functions will hereinafter appear. At the head of the screen frame the channel-bars 30 and 31 project beyond the upper supporting or end-bar 12 and receive in suitable bearings the shaft 4. Said shaft 4 is rotated through the medium of drive-wheels 3 and carries preferably outside said bars 30 and 31, the cams 1 and 2.

Mounted in the guides 34, above mentioned, and capable of independent movement therein, are the connecting or shaking bars 14 and 16, whose relative positions are both seen in Fig. 4. It is evident that the bars in channel iron 31 are arranged oppositely to those in channel iron 30, but are otherwise identical in arrangement and operation. A description of one side then will suffice for both. Bar 16 is comparatively larger than bar 14, and receives the latter in a longitudinal recess, between which and overhanging lips 34 on the guides 34 said bar 14 is slidably secured. The rear end of bar 16 is longitudinally slotted at 16 to inclose the shaft 4 and has its rear end provided with a stud carrying the cam roller 26 which operates in the cam-groove of cam l. The other bar 14, terminates at the rear side of the shaft 4 and is provided with a cam roller 28, which occurs oppositely to the roller 26. The cams l and 2 are formed to throw the rollers and consequently the bars 14 and 16 oppositely at the same instant, so that opposite reciprocations thereof may be effected, and the corresponding bars on side 31 are connected to the identical cam 2 in such relation that the movements correspond tothe movements of the bars in side or bar 30.

Projecting from the bars 14 and 16 at spaced intervals are the studs or lugs 22 and 24, which engage for sliding movement the slots 20 in crank arms 18 and 20. Said arms 18 and 20 are mounted on the shafts 5, 6, 7 and 8, said shafts being adapted to carry the clearing blades hereinafter described. Said shafts are mounted between the bars 30 and 31 and project therethrough, to carry on their projecting ends the said crank arms 18 and 20. Thus, as bars 14 and 16 are reciprocated, the crank arms 18 and 20 are reciprocated through the medium of studs 22 and 24 to oscillate said shafts 5, 6, 7 and 8.

The clearing blades above mentioned, and designated by 11 and 33, are hung on said shafts 5, 6, 7 and 8 in such relation that a blade will be provided for the space between each two screen bars, and each shaft carries its independent set. Said bars 14 and 16 being given independent reciprocating movements by the cams 1 and 2, the rocker-shafts and consequently the clearing-blades are given varying movements of oscillation. Thus the blades are forced between the screenbars in sections or section by section, to the better manipulation of the sand or clay, and the prevention of the clogging usual to ordinary screens as the clay is fed from top to bottom thereof.

Whenever the nature of the clay or sand is such as to need but one set of clearing blades,all but one of the cam rolls may be removed, or one from each cam, thus giving alternate sections of the screen the service of clearing bars, or by means of a locking screw 39 which is threaded in bars 14 and may be used with one of the cam rolls removed, both connecting bars on that side-vmay. be driven 1n umson.

Should it be desired to operate -al-l=bladesin unison the cams may be set to work in unison with one roll in each, and the locking screw 111 each side in positlon-as described, thus g1v1ng all blades the same actlon at the same time. It will be seen that the clearing.

blades are in the form of elbows, thus keeping their shafts below and'out of'th'e way at the same time having the effect of bringing the blade into action for its whole length at nearly the same time. The upper corner.

of sectors, thus givingme the rounded upper edge with its advantages as found 1n the use of wire, .and at the same time my wide bars with diminishing thickness allows-any.

material entering the openingto pass through besides giving me the necessary stock for strength, and'to allow my supportingand spacing combs to hold the barsfi'rmly without obstructing the screen surface. By means ofmyscreen bar clamp 36 I am able to release the ends of all the bars at once, to replace a damaged'bar, or to put in a set of combshaving a different spacing, so that my screen may be quickly changedto any desired condition oftspaces to meet-varying needs. Said clamp 36 consists of an L- shaped member 21 recessed to receive a beveled leaf or bar 36 below thenprojecting edge of which the screen bars 10 are secured. Headed bolts 87, carrying :nuts, areextended through said'bar and said member 21 to permitthe adjustment of-the former. Thus a ready change of the bars 10 in a new spacing thereofin combs 9' is permitted. Bolt 38 is a raising device to support the clamp bar 36 when the bars 10 are being adjusted.

XV hen desired the bars may be in as many pieces as conditions warrant by using. my

center support shown in Fig. 6" with the:

beveled ends of bars entered before the end clamps are tightened, thus giving a smooth surface for any" length regardless of the length of the bars.

Having thus described my invention, what I claim as new and desire to secure by Letters-Patent is.

1. In a screening device, in combination with the screening bars, a plurality of rock shafts, a set of oscillatory clearing blades mounted on said shaft, and adapted to enter between said bars, and sliding means operatively connected to said rock shafts to cause the latter to oscillate said blades between said barsin successive order.

verse rock-shafts, crank arms carried by said rock-shafts, longitudinally movable slidebars having slottedconnections with said.

crank arms, means for reciprocating said slide-bars and clearing blades mounted on said rock shafts and adapted to be oscillated between said. screen bars.

4. In a screening device, in combination, with the screening bars, a plurality of oscillatory clearing blades adapted'to enter between said bars, means for inountingsaid blades, andmeans to rock said blades, said blades comprisingelongated fingersv having eccentrically formed heels aperturedto be mounted on said'mounting means and adapted to project a portion thereof continuousl y between said screen-bars.

5. A screen, comprising, in combination, a frame having longitudinal channel-bars at itssides, slide-bars operative in said channelbars, means to reciprocate-said slide-bars, transverse rock-shafts operatively connected to said slide-bars, longitudinal screen-bars.

and clearing blades mounted on said rockshafts'and'adapted to be oscillated between said screen-bars.

AD OLP-H W. HOLL. WVitnesses:

\VM. L. OOLLINGRI'DGE, H. V. MAIN. 

